When the Helper comes, whom I shall send to you from the Father, the Spirit of truth who proceeds from the Father, He will testify of Me. John 15:26 (NKJV)
Although the Holy Spirit is defined to a degree by His various roles—teacher, guide, and helper—His identity rests on three truths:
(1) The Holy Spirit is God. In several instances, the Holy Spirit is referred to as “the Spirit of God.”
(2) He is one with God, the third person of the Trinity. As such, He possesses the inherent nature and character of God. The Greek word for “another” in John 14:16-17 is literally translated “another of the same kind.” Thus, the Holy Spirit is God Himself, omnipotent (Job 33:4), omnipresent (Psalm 139:7-10), and omniscient (1 Corinthians 2:10-12).
(3) Since the Holy Spirit is a person, He is God. The Holy Spirit likewise is marked by a distinct personality. He is not an “it.” He has a will (1 Corinthians 12:11), emotions (Ephesians 4:30), and intellect (Romans 8:27).
As a person, the Holy Spirit can be resisted, lied to, and grieved. The Holy Spirit is life. The Holy Spirit helped birth the universe (Genesis 1:2). Christ was conceived by an act of the Holy Spirit. The believer is given God’s life through His indwelling, and the abundant life is possible only through His activity.